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M-Class (W166) Produced 2012-2015

It doesn't accelerate

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Old Mar 1, 2019 | 05:10 AM
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mikepaltri's Avatar
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W166 ML 250
It doesn't accelerate
I have a Mercedes ML 250 2012 and it's my first post here.
I am from GREECE and I have the following problem: it doesn't accelerate over 80km/h and 4th gear. I push my foot all the way down the gas pedal but it does not respond!!!
It behaves as it has entered a safe mode!!!
Any ideas please?
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Old Mar 1, 2019 | 01:14 PM
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we47b1me
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Originally Posted by mikepaltri
I have a Mercedes ML 250 2012 and it's my first post here.
I am from GREECE and I have the following problem: it doesn't accelerate over 80km/h and 4th gear. I push my foot all the way down the gas pedal but it does not respond!!!
It behaves as it has entered a safe mode!!!
Any ideas please?
Scan the truck with a pro grade scanner
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Old Mar 4, 2019 | 04:15 AM
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W166 ML 250
I went to a dealership, he scanned my truck but it shows no malfunction...
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Old Mar 4, 2019 | 09:34 AM
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we47b1me
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'22 GLE 350 | '15 ML250 | '87 560SL | '19 GLC 300 | '12 C250 (sold) | '02 ML500 | '98 C230
Originally Posted by mikepaltri
I went to a dealership, he scanned my truck but it shows no malfunction...
Not possible, calling BS on this. It's impossible to walk out of a MB service center with a problem like that which you can duplicate and they say "nothing wrong"
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Old Mar 5, 2019 | 01:05 AM
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W166 ML 250
Today morning my ML did it again. I'll visit a NEW MB service center hoping to get a solution....
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Old Mar 5, 2019 | 01:23 AM
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W166 ML 250
I'll also try a TCU reset by myself....
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Old Mar 7, 2019 | 05:18 AM
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W166 ML 250
Well, in my case the problem seems to be the intercooler tube. I'm looking for the replacement now...
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Old Aug 4, 2021 | 10:27 AM
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Originally Posted by mikepaltri
I have a Mercedes ML 250 2012 and it's my first post here.
I am from GREECE and I have the following problem: it doesn't accelerate over 80km/h and 4th gear. I push my foot all the way down the gas pedal but it does not respond!!!
It behaves as it has entered a safe mode!!!
Any ideas please?
How did you solve this problem... Im experiencing the same problem...

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Old Aug 4, 2021 | 07:09 PM
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Originally Posted by mikepaltri
Well, in my case the problem seems to be the intercooler tube. I'm looking for the replacement now...
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Old Aug 6, 2021 | 03:41 PM
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ML350
Test if you have the same issue as the others. Open the hood, put your hand around the intercooler air duct. If you feel a lot air leak out, the duct leak. Some people find the right side (after intercooler) is common issue. It can be fixed temporary by a good strong sticky tape. Just tape around the leaked spot couple round.
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